State whether or not the following triangles are similar. If not, explain why not. If so, write a similarity statement

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06-04-2021
Mathematics

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State whether or not the following triangles are similar. If not, explain why not. If so, write a similarity statement

Sagot :

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sqdancefan sqdancefan · Answer 1 · 2021-05-12T16:10:47-04:00

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Answer:

a) ∆RLG ~ ∆NCP; SF: 3/2 (smaller to larger)

b) no; different angles

Step-by-step explanation:

a) The triangles will be similar if their angles are congruent. The scale factor will be the ratio of any side to its corresponding side.

The third angle in ∆RLG is 180° -79° -67° = 34°. So, the two angles 34° and 67° in ∆RLG match the corresponding angles in ∆NCP. The triangles are similar by the AA postulate.

Working clockwise around each figure, the sequence of angles from lower left is 34°, 79°, 67°. So, we can write the similarity statement by naming the vertices in the same order: ∆RLG ~ ∆NCP.

The scale factor relating the second triangle to the first is ...

NC/RL = 45/30 = 3/2

__

b) In order for the angles of one triangle to be congruent to the angles of the other triangle, at least one member of a list of two of the angles must match for the two triangles. Neither of the numbers 57°, 85° match either of the numbers 38°, 54°, so we know the two triangles have different angle measures. They cannot be similar.

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